Buttonhole-sewing machine.



PATENTED OCT. 13, 1903. J. T. HOGAN. BUTTONHOLE SEWING MACHINE.

APPLIOATION FILED JULY 28. 1902.

6 SHEETS-SHEET L N0 MODEL.

W/ TNESSES. W 4/1 :14

IIVVENTOI? ums PETERS on PHOTO-1.11110 \VAZNIAUT PATENTED 001 13, 1903.

I J.T.HOGAN. BUTTONHO'LE SEWING MACHINE.

APPLIUATION-FILED JULY 28 1902.

6 SHEETSSHEET 2.

NO MODEL.

I INVENTOH WITNESSES Map WW4 PATENTED OCT. 13, 1903.

J. T. HOGAN. BUTTONHOLE SEWING MACHINE.

APPLICATION FILED JULY 28. 1902.

5 SHEETS-SHEET 3.

N0 MODEL.

WITNESSES. @AJ'QD MWQ 2/ V3. mz,

PATENTED OCT. 13, 1903.

J. T. HOGAN. BUTTONHOLE SEWING MACHINE.

ABPLIOATION FILED JULY 28. 1902.

s SHEETS-SHEET 4..

N0 MODEL.

//v VENTOP WITNESSES.- W M mmma PE rERs co. PHOYQLITND. msumcmwo c.

PAT ENTED OCT. 13, 1903. :1. T. HOGAN. BUTTONHLOL-E SEWING MACHINE.

APPLIQATION FILED JULY 28, 19,02.

6 SHEETS-SHEET :5.

no MODEL.

INVENTOR WITNESSES. I

9 ATTORNEYS no. 7 1L340.

Fatente'd October 13, 1903.

. NITED Snares Arnnr tries.

JAMES T. HOGAN, OF JERSEY CITY, NEW JERSEY, ASSIGNOR TO THE NATIONALMACHINE COMPANY, OF TROY, NEYV YORK, A CORPO- RATION OF NEW YORK.

BUTTONHOLE-SEWING MACHINE.

SPECIFICATION forming part of Letters Patent N0. 741,340, dated October13, 1903.

Application filed July 28, 1902. Serial No. 117,231. (No model-.3

T0 at whom it may concern:

Be it known that I, JAMES T. HOGAN, a citizen of the United States,residing in Jersey City, county of Hudson, and State of New Jersey, haveinvented new and useful Improvements in Buttonhole-Sewing Machines, ofwhich the following is a description.

My invention relates to sewing-machines which are specially adapted forstitching or making buttonholes, and more particularly to that class ortype of buttonhole-stitching machines which form a straight bar acrossthe ends of the buttonhole or at right angles to the length of thelatter.

The object of my invention is to provide a buttonhole-stitching machinewhich will be light-running, simple in structure, and consequentlycapable of attaining high speed, and one which will bind and bar abuttonhole rapidly and effectively and produce a buttonhole of greatcommercial value.

With these objects and ends in View my invention consists of themechanism, parts, features, and combination of elements hereinafterdescribed and claimed.

In the drawings forming part of this specification, Figure 1 is a sideelevation of the machine, part of the bed-plate being broken away so asto show the mechanism which 0perates the cloth-clamp and controls theposition of the end of the needle-bar-operating pitman. Fig. 2 is adetail perspective of the mechanism for vibrating the needle bar. Fig. 3is an elevation of the toggleplates separated. Fig. 4 is a bottom planof the ratchet mechanism and stepped cam. Fig. 5 is a cross-section onthe line at w of Fig. 4, showing the means for supporting the ratchetmechanism. Fig. 6 is a side elevation of the ratchet mechanism and themeans for actuating-the stepped cam. Fig. 7 is a diagrammatic view ofthe buttonhole; and Fig. 8 is a perspective view of the machine, showingthe position of the parts for beginning the buttonhole. Fig. 9 is adiagrammatic view of certain portions of the machine, showing particularly the means for transmitting lateral movement to the needle'barand illustrating results attained from certain movements and adjustmentsthereof.

ing operation,- and in this connection it is to be notedalso that a stopmechanism will be provided, so as to bring the machine to a stop at theend of each stitching and cutting operation. form of stitch-formingmechanism may be employed, provided it involves a movable gate in whichthe needle-bar is caused to reciprocate vertically; also, that anysuitable form of cloth-clamp may be used. None of these mechanisms,however, is shown,because it is desired to emphasize those parts whichconstitute the salient features of my invention and avoid confusion byshowing details and parts unnecessary to a clear understanding of thesame.

In this specification I will refer in describing the manner of stitchingthe buttonhole to the slit thereof, and by this term or expression Imean to be understood as referring to that portion which lies betweenthe two series or lines of binding-stitches, and this whether aslit hasbeen cut therein or not.

In stitching a buttonhole on my machine the binding-stitches are firstplaced on the left side of the slit by a combined progressive feedmovement of the clamp and a vibratory movement of the needle bar atright angles to the said feed movement, the stitching beginning at theslit of the buttonhole or adjacent that end thereof which may bereferred to as the fiuishend. Then the first set of barring-stitches isformed by shifting laterally the working position of vibration of theneedle-bar and simultaneously increasing its vibratory movement,together with a cessation of the feeding movement of the clamp, theincrease in vibration being equal on both sides of the slit andextending to the extreme outer edge of the stitching constituting thetwo rows or series of binding-stitches, the beginning of the barringbeing at the extreme outer edge of the first series of binding-stitchesand extending, as before noted, to the ex- It is to be further notedthat any a simultaneous increase treme outer edge of the second seriesof bind-' ing-stitches, two or more of such barringstitches being piledin substantially the same place across the end of the buttonhole-slit.Then the second side of the buttonhole is bound by a series of stitchesproduced by a progressive reverse feed of the clamp combined with avibratory movement of the needle-bar of the same extent as the vibratorymovement thereof duringthe binding of the first side of the buttonhole,the initial stitch in the binding series being placed adjacent the slitand extending from the last barringstitch. This binding action is theresult of a still further lateral shift of the working position ofvibration of the needle bar combined with a simultaneous decrease in itsvibratory movement. Then the finish end of the buttonhole is barred by aseries of stitches piled one upon the other and produced by a cessationof the reverse feed movement of the clamp and a lateral reverse shift ofthe working position of vibration of the needle-bar and in the vibrationthereof, the increase in vibration being equal on both sides of the slitand to the same extent as that employed in producing the first bar, suchbar-stitches extending from the extreme outer edge of the second seriesof binding-stitches to the extreme outer edge of the first series ofbinding-stitches, the last two or more barring-stitches, however, beingprogressively shorter than the first several stitches made in the barand being progressively shortened toward the first series ofbinding-stitches. It is to be noted that in producing the buttonholeaccording to my in vention the working position of vibration of theneedle-baris severalti mes shifted or changed, so as to produce thebinding-stitches on opposite sides of the slit or of the central line ofthe buttonhole and the barring equally on both sides of said slit orlinethat is to say, the change or shift of the working position ofvibration of the needle-bar is multiplex and is in one direction or thereverse, according to which side and end of the buttonhole are beingstitched.

As before noted, the clamp for holding the work may be of any usualform, and the mechanism for actuating the same may be of any well-knowncharacter for giving the clamp a simple progressive feed crosswise ofthe bed-plate, then causing it to come to a full stop, then causing itto be fed progressively in the opposite direction across the bed-plate,and again come to a full stop. It will be observed that these aresimple, ordinary, and well-known movements in the art, and inconsequence no details of the mechanism for producing the same have beenillustrated.

The mechanism for vibrating the needlebar 1 transversely to thebuttonhole-slit consists of an ordinary pivoted gate in the head 2 ofthe machine, connected pivotally to the pitman 3, which in turn issleeved upon a pin 3, carried on the elongated flattened upper end 4 ofthe vertical bar or rod 5,whose innerside carries a pin 6, acting as ajournal for an antifriction-roll '7, which runs in the track or guideway8 of the members of the toggle mechanism hereinafter described. The endof the pitman is held to pin 3 bya screw 3". The vertical rod 5 isconnected pivotally at its lower end to a lever 9, fulcrumed to a hanger10 on the bottom of the bed-plate. Intermediate its ends the lever 9 isprovided with a lug 11, adjustable by screws 11 passing through slots 11in lever 9, which contacts with the stepped cam 12 for the purpose ofshifting the vertical rod, as hereinafter described. Said vertical rodis provided with an adjustable collar 13 and is surrounded by a coiledspring 14, one end of which rests upon the bed-plate'and the other endof which is confined and controlled by said collar.

A cam-disk 15 is secured to a gear and supported on a short shaft, pin,or screw 15 in the overhanging arm of the machine and isoperated by anordinary gear from the main shaftin said arm. Said cam-disk is providedwith a cam-groove 16, in which runs an antifriction roll or pin 17,carried by a lever 18, journaled in the overhanging arm andlongitudinally slotted at 19. A plate 20 is secured to the overhangingarm and is slotted at 21 for the passage of said pin or roll 17. Saidplate 20 carries a second plate 21, journaled centrally thereon by a pin22, projecting therefrom and entering an aperture 23 in the secondaryplate, said latter plate being circularly adjustable by means of curvedslots 24 and adjusting-screws 25 entering the primary plate. Thesecondary plate has fulcrumed thereto at 26 the member 26 of the togglemechanism, the other member 27 being pivoted to the member 26 at 28 andbeing longitudinally slotted at 29 for the passage of a guiding-screw30. The toggle members 26 and 27 are provided with side flanges orshoulders and constitute a guide for the friction-roll 7, carried by thepitman 3 and the vertical rod 5. The member 26 of the toggle mechanismis bifurcated at 31 on opposite sides, so as to receive the tongues 32of the other member of the toggle mechanism, said parts sliding freely,so as to give ease of movement. A link 33 connects the fulcrum 28 of thetoggle mechanism with the vibrating lever 18, in the slot of which theother end of said link is adjustable by the clamping screw 33 for thepurpose of changing the extent of vibration of the needle-bar. The bar34, connected to the primary plate, extends transversely across theneedle-bar pitman and is provided for the purpose of preventing the endof the latter and the end of the vertical bar or rod 5 from springingaway from the track or guideway 8 in the toggle plates or members.

The pitman 35, actuated in any suitable manner from the vertical shaft36 of the machine, is pivotally connected to the plate 37, which carriesa double-pawl device for actu- ICC hub 40 journaled on the stud and thelower one, 41, of which is journaled on a short projection 42 of saidstud and is held closely against the latter by means of a headed screw43 and an intermediate friction-washer 44.

The pawl-plate 37 is journaled on the extended hub 40 of theratchet-plate 39. The upper ratchet-plate 39 has its entirecircumference toothed, while the lower ratchet-plate 41 has a portion 41only toothed, which portion 41 extends beyond the teeth of the otherratchet-plate. The loWer'ratchet-plate has a concentric slot 43 throughwhich projects a pin 44, fixed in the upper ratchet-plate. The lowerratchet-plate is also provided with two circularly-adjustable plates 4546, which are caused to project more or'less over the ends of saidconcentric slot. The pin 44 also extends into the forked end 48 of thecrankplate 49, connected to the pinion 50, carried by the stud 51,journaled in the bracket 52, secured to the under side of the bed-plate,which pinion meshes with the gear 53, having on its under side thestepped cam for actuating the vertical rod 5, which shifts the end ofthe pitman 3 relative to and along the toggle mechanism. The gear 53 isprovided with a sleeve 54, secured to a short shaft 55, suitablyjournaled in the bed-plate, and at the upper end of which shaft 55 isthe slotted disk 56, to which the link 57 is clamped, which link isconnected to the slide-bar 58, guided between parallel bars 59 on thebed-plate, and which slide-bar suitably supports a clothclamp 60 andgives the same its feed movement.

The cam 12, which operates the vertical rod 5, has two inclines a c,separated by an intermediate horizontal portion b, and at the other endof the extensive horizontal portion d, occupying substantially ahalf-circle, are two abrupt steps or shoulders e g and between them ashort horizontal portion f. Extending from the second shoulder g to thefirst incline a is an extensive horizontal portion h, corresponding tothe horizontal portion (1, but located in a different plane.

The pawl mechanism consists of the short pawl 61, springpressed towardthe lower ratchet-plate 41 and having a contact edge which is only wideenough to engage said lower ratchet-plate, and a long pawl62,springpressed toward the ratchet-plates and having a contact edgebroad enough to engage both the ratchet-plates.

WVhen the ratchet-plates are actuated, the pin 44", carried by one ofthem, actuates the pinion 50, which in turn aetuates the stepped cam 12in the direction indicated by the arrow a; by meshing with the gearthereof.

The mechanism in the position shown in Figs. 1 and 8 will start thebuttonhole by planting the first stitch adjacent the central the steppedcam.

line thereof, as at t', and the progressive feed and vibratory movementof the needle-bar will produce the binding-stitches along, the edge ofthe buttonhole-slit at 70, such bindingstitches being produced while thelug 11 is traveling along the extensive surface at of When the lugreaches the shoulder or abrupt portion 6, the spring 14 causes the lugto suddenly shift to the short portion fand carry the end of the pitman3 into coincidence with the fulcrum of the toggle mechanism, thusgetting the full movement of said mechanism and increasing the vibrationof the needle-bar and piling up several barring-stitches l at the firstend of the buttonhole, this barring action taking place while the lug ison the said short portion f, said lug remaining sutficiently long onsaid short portion to enable two or more barringstitches to be made orplaced. Then the lug abruptly shifts over shoulder g to the extensivesurface it of the cam, resulting in shifting the pitman connection,withthe rod 5, to a point above the fulcrum of the toggle mechanism andcurtailing the vibratory movement of the needle-bar, in which positionthe parts remain during the reverse progressive movement of the feedmechanism. When the last of the second series or set of bindingsti'tchesm has been made, the lug will ascend the first incline a to the shortportion 12 of the cam, which results in drawing the pitman connectioninto coincidence with the fulcrum of the toggle mechanism and produces aseries of long barring-stitches it across the end of the buttonhole,such barring-stitches being placed while the lug is on said shortportionb of the'cam. When the lug traverses the second incline c, thepitman connection, with the rod 5, is slowly drawn below the fulcrum ofthe toggle mechanism, resulting in a gradual shortening of thebarring-stitches, until the extensive portion d of the cam is againreached, at which time the buttonhole will be finished and the machinewill be caused to stop by any suitable stop mechanism, as before noted.The short barringstitches are indicated at 0.

It is to be noted that Fig. 7 is merely diagrammatic of the buttonholeand that the barring-stitches are in reality piled across the ends ofthe slit, the spread arrangement in Fig. 7 being for the purpose ofclearly showing the sequence and character of the stitches.

It will be observed that the adjustable connection between the vibratinglever 18 and the link 33 enables the length of both the binding andbarring stitches to be regulated simultaneously or increased ordiminished at will and that such regulation of the stitches, both in thebar and in the sides of the buttonhole, is proportional and isaccomplished by the single adjustmentthat is to say, the singleadjustment regulates the length of the binding-stitches and suchadjustment necessarily entails a proportional regulation of the lengthof the barring-stitches. Furthermore, it is to be noted that a slightadjustment of the secondary plate 21 to the right The severaladjustments above noted are important features of my invention, and uponthem I desire to place particular stress.

Another important feature of my invention is the means for regulatingthe number of stitches placed in each bar. The adjustable plate 45,carried by the lower ratchet-plate 41, performs this function bycontrolling the amount of movementthe two ratchet-plates 39and41mayhaveindependentlyofeachotherthat is to say, the position of saidplate 45 relatively to the concentric slot 43 determines the time thelower ratchet-plate 41 may run independently of the upper ratchet-plate39, the time the lug ll may dwell on the short portions 19 fof thestepped cam, and consequently the number of barring-stitches at each endof the buttonhole. The adjustable plate 46 is for the purpose ofsecuring an initial relative adjustment of the two ratchetplates-that isto say,to provide for the proper operation of the ratchet-plate 41relatively to the ratchet-plate 39.

The toggle mechanism herein described, aside from being simple, compact,and easyrunning, produces some peculiarities of function upon whichstress should be placed. First, the direction of change or shift in theworking position of vibration of the needlebar is alternately inopposite directions and equally from one side to the other of thebuttonhole; secondly, the extent or amplitude of vibration of theneedle-bar in barring is increased equally on opposite sides of theslit; thirdly, the full throw of the toggle is given when the connectionof the pitman with the rod is coincident withthe fulcrum of thetoggle-plates; fourthly, the adjustment of the secondary plate to varythe width of the buttonhole-slit does not afiect the length of thestitches nor disturb the action of the toggle mechanism, and, fifthly,during the formation of a buttonhole the change or shift of the workingposition of vibration of the needlebar is of a multiplex character.These various movements and the relative adjustments of the Variousparts will be understood more fully with reference to Fig. 9, which isadiagrammatic representation of the mechanism for transmitting thevibratory movement to the needle-bar. Certain of the parts--s uch,forinstance, as the lever 18, toggle-links 26 and 27, link 33, and thepitman 3-are illustrated in thisdiagrammatic figure bysingle lines onlyand their centers and range of movement by dots and broken lines. Thepitman 3, in connection with the vibrating-head carrying the needle-bar,will itself have a movement either equal or in direct proportion to anymovement of the needle-bar, and hence its inner end or point ofconnection with the toggle-links may for purposes of this specificationbe considered the movement of the needle itself. In such case line 0 1;will represent the central line of the buttonhole oralinepassinglongitudinally through the slit thereof. A vibration of the linksin the manner before stated will produce a like vibration of the pitman,having an amplitude of movement and a position of such movement withrespect to the line '12 o, as indicated herein by the line 00. When theposition of connection of the inner end of the pitman with the links 26and 27 is shifted to a position common to both said linksthat is to say,to a position coincident with their pivotal connection with eachotherthe vibration of the links will produce a vibration of the pitmanequal to the line 2 .2, while the shifting of the point of connection ofthe pitman 3 up to the point to on the link 27 will result in avibration thereof equal to the line y. The line y and the line a: areequivalents, but are on opposite sides of the central line '1) 2;, whilethe line 2 is a line extending in equal directions upon both sides ofthe line '0 o. A shifting of the plate 21 about its axis of rotationwill result in shifting the positions of the lines 00 and y to adistance farther away from or nearer to the line 11 1) Withoutsubstantial change to the line 2. A change of connection between thelinks 33 and the lever 18, however,will result in an increase of throwof the toggle-links 26 and 27, and hence a proportionate increase in thelength of the lines 00, y, and .2.

It will thus be seen that I have produced a simple light runningbuttonhole machine, and one having few parts and the inherent capabilityof high speed, also that my machine produces a buttonhole havingits endsfirmly barred close to the binding-stitches, no gaps or wide spacesbeing left between the binding and barring stitches because the firstbinding-stitch of each row or series is planted adjacent the slit andthe last binding-stitch of each row or series is carried practicallyinto the bar or extended beyond the ends of the slit. Hence thebuttonhole will not spread or gape at its ends.

The length of the buttonhole may be varied in this machine in a mannercommon in the art by adjusting the link 57 on the disk 56, thus changingthe length of the feeding movement of the work clamp or holder.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is-

1. A buttonhole-sewing machine comprising stitch-forming mechanism,including a' vertically-reciprocating and laterally-vibratingneedle-bar; mechanism for transmitting such vibratory movement,including a plurality of vibrating members and a connection therefrom tosaid needle-bar; and means for shifting such connection from one saidvibrating member to another.

2. A buttonhole-sewing machine comprising stitch-forming mechanism,including a vertically-reciprocating and laterally-vibrating needle-bar;mechanism for transmitting such vibratory movement, including twovibrating members connected together but permitted movements relativelyof each other, and a connection therefrom to said needlebar; and meansfor shifting such connection from one said vibrating member to anotherand to a point common-to both said members.

3. A buttonhole-sewing machine comprising stitch-forming mechanismincluding a vertically-reciprocating and laterally-vibrating needle-bar;vibrating mechanism incl uding a guide and means for imparting thereto arange of movement constant at all times during the operation of themachine, one point of said guide moving to and fro upon opposite sidesof a straight line, another point thereof moving to and fro upon oneside only of such line, and another point thereof moving to and fro uponthe other side only of such line; and means connecting said needle-barwith the said vibrating mechanism, and movable along said guide to andbetween said points.

4. A buttonhole-sewing machine comprising stitch-forming mechanismincluding a vertically-reciprocatin g and laterally-vibratingneedle-bar; vibrating mechanism including a guide and means forimparting thereto a range of movement constant at all times during theoperation of the machine, one point of said guide moving to and fro uponopposite sides of a straight line, another point thereof moving to andfro upon one side only of such line, and another point thereof moving toand fro upon the other side only of such line; and means connecting saidneedle-bar with the said vibrating mechanism at any one of the threesaid points, and for automatically shifting said connection along saidguide between said points.

5. A buttonhole-sewing machine comprising stitch-forming mechanismincluding a vertically-reciprocating and laterally-vibrating needle-bar;vibrating mechanism including a guide having a range of movementconstant and uniform at all times during the sewing of a completebuttonhole, said guide including a portion which moves to and fro uponopposite sides of a straight line, another portion which moves to andfro upon one side only of such line, and another portion which moves toand fro upon the other side only of such line, and a member connectingsaid vibrating needle-bar with said guide; means for shifting theconnection of said member along said guide to various points therein toeffect changes of lateral move= ments of the vibrating needle-barnecessary for stitching upon'opposite sides of a straight line and uponeach side only of said line independent of lateral movement of the workoperated upon, and means for operating the said vibrating mechanism.

6. A buttonhole-sewing machine comprising stitch-forming mechanismincluding a vertically-reciprocating and laterally-vibrating needlebar;mechanism for transmitting such lateral vibration thereto, including aguide, vibrated about a fixed axis, a support for the guide heldstationary during the operation of sewing a complete buttonhole, and amember connecting the needle-bar with the vibrating guide and movablealong the same; and means for vibrating the said guide to producelateral movements of the needlebar for stitching on either side of thebuttonhole, and stitching at the end of the buttonhole, upon oppositesides of a central line fpassing longitudinally through the buttonholeindependent of any lateral movement of the work operated upon.

7. A buttonhole-sewing machine comprising stitch-forming mechanismincluding a vertically-reciprocating and laterally-vibrating needle-bar;mechanism for transmitting such lateral vibration thereto, including aguide, vibrated about a fixed axis, a support for the guide heldstationary during the operation of sewing a complete buttonhole, lbutcapable of manual adjustment for different buttonholes, and a memberconnecting the needle-bar with the vibrating guide and movable along thesame; and means for vibrating the said guide to produce lateralmovements of the needle-bar for stitching on either side of thebuttonhole, and stitching at the end of the buttonhole, upon oppositesides of a central line passing longitudinally through the buttonholeindependent of any lateral movement of the work operated upon.

8. A buttouhole-sewing machine comprising stitch-forming mechanismincluding a vertically-reciprocating and laterally-vibrating needle-bar;mechanism for transmitting such lateral vibration thereto, includingconnected links mounted upon a support held stationary during theoperation of sewing a complete buttonhole; means for vibrating the saidlinks; and means adjustable from one said links to the other connectingsame with the said needle-bar.

9. In abuttonholesewin g machine,tlie combination with stitch-formingmechanism including a vertically-reciprocating and laterally-vibratingneedle-bar, of mechanism for transmitting such vibratory movementincluding an adjustable supporting-plate, toggle-links carried therebyby pivotal connection therewith toward their outer ends, said linkspivoted together at their inner ends, and means adjustable with respectto said toggle-links connecting same to said needlebar; and means forvibrating said links.

10. In a buttonhole-sewing. machine, the combination with stitch-formingmechanism including a vertically-reciprocating and laterally-vibratingneedle-bar, of mechanism for transmitting such vibratory movementincluding a plate adjustably supported about an axis of rotation,toggle-links having their outer ends pivoted thereto at points onopposite sides of said axis of rotation, said links pivotally connectedtogether at their inner ends, and a pitman adjustable with respect tosaid toggle-links, connecting same with the said needle-bar; and meansfor transmitting a vibratory movement to said links.

117 In a buttonhole-sewing machine, the combination with stitch-formingmechanism including a vertically-reciprocating and laterally-vibratingneedle-bar, of mechanism for transmitting such vibratory movementincluding avibrating element and a pitman in connection with saidneedle-bar, toggle-links connected together at their inner ends and tosaid moving element, said pitman deriving motion from the saidtoggle-links and having means for adjusting it to various positions inconnection therewith, and an adjustable support to the outer ends of thesaid links.

12. In a buttonhole-sewing machine, the combination with stitch-formingmechanism including a vertically-reciprocating and laterally-vibratingneedle-bar, of mechanism for transmitting such vibratory movementincludinga vibratory element, toggle-links connected thereto, a pitmanin connection with said needle-bar and derivingmotion from saidtoggle-links, said pitman having means for adjusting it to variouspositions of connection with said toggle-links from a point common toboth said links to points on either side thereof, a support for saidtoggle-links, and means permitting adjustment of said support butholding same stationary during the normal operation of the machine.

13. In a buttonhole-sewing machine, the combination with stitch-formingmechanism includinga vertically-reciprocating and laterally-vibratingneedle-bar, of mechanism for transmitting such vibratory movementincluding a plate adjustably supported about an axis of rotation,toggle-links having their outer ends pivoted thereto at points onopposite sides of said axis of rotation, said links pivoted together attheir inner ends, apivoted lever, means for imparting thereto a constantdegree of movement, a link connecting said toggle-links with saidpivoted lever and capable of adjustment with said pivoted lever tovarious points toward and away from the axis of its pivotal support, anda pitman adjustable with respect to the said toggle-links connectingsame with the said needle-bar.

14. A buttonhole-sewing machine comprising a stitch-forming mechanismincluding a vertically-reelprocating and laterally-vibratory needle-bar;means foractuating the same including a toggle mechanism having tworelatively movable members, a pitman connecting the same with theneedle-bar, and means for shifting the pitman connection with the togglemechanism from one said member to the other in order to change theamplitude of vibration of the needle-bar.

15. A buttonhole-sewing machine comprising a stitch-forming mechanismincluding a vertically-reciprocating and laterally-vibratoryneedle-bar;means foractuating the same including a toggle mechanism having tworelatively movable members, a pitman connecting the same with theneedle-bar, means for varying the movement of the toggle mechanism, andmeans for shifting the pitman connection with the toggle mechanism fromone said member to the other in order to change the amplitude ofvibration of the needle-bar.

16. A buttonhole-sewing machine comprising a stitch-forming mechanismincluding a vertically-reciprocating and laterally-vibratory needle-bar;means for actuating the same including a toggle mechanism having tworelatively movable pivoted members, the pivots thereof arranged in aline inclined relatively to the line of movement of the needle-bar, apitman connecting the same with the needlebar, and means for shiftingthe pitman connection with the toggle mechanism from one said member tothe other in order to change the amplitude of vibration of theneedle-bar and also the working position of vibration thereof.

17. A buttonhole-sewing machine comprising a stitch-forming mechanismincluding a vertical]y-reciprocating and laterally-vibratory needle-bar;means for actuating the same including a toggle mechanism, a pitmanconnecting the same with the needle-bar, means for shifting the pitmanconnection with the toggle mechanism relative to the latter in order tochange the amplitude of vibration of the needle-bar; and means foradjusting the toggle mechanism so as to vary the distance betweensuccessive lines of stitches.

18. A buttonhole-sewing machine comprising a stitch-forming mechanismincluding a vertically-reciprocating and laterally-vibratory needle-bar,means for actuating the same including a toggle mechanism having tworelatively movable members, a pitman connecting the same with theneedle-bar, and means for shifting the pitman connection with the togglemechanism from one said member to the other; and means for maintainingsaid connection between the toggle mechanism and pitman.

19. A buttonhole-sewing machine comprising a vertically-reciprocatingand laterallyvibratory needlebar; means for actuating the same includinga toggle mechanism having two relatively movable members, and a pitmanconnecting the latter with the needlebar; and means for shifting saidconnection relative to said toggle mechanism from one said member to theother including a rod, a cam for actuating thesame in one direction anda spring for actuating the same in the 0pposite direction.

20. A buttonhole-sewing machine comprising a vertically-reciprocatingand laterallyvibratory needle-bar; means for actuating the sameincluding a toggle mechanism havof contact between said lug and certainpor- IO tions of the cam.

In testimony whereof I have hereunto signed my name in the presence oftwo subscribing witnesses.

JAMES 'I. HOGAN. Witnesses:

CHAS. M00. CHAPMAN, M. B. HOARE.

